Nut-tapping machine



July 10, i923.

)LALLIVH R. F. BARNES NUT TAPPING MACHINE Filed March 1e. 1921 2Sheets-Sheet l July w, 923. nmwm VR. F. BARNES NUT TAPPING MACHINE"F-iled March 16. 1921 2 Sheets-Sheet 2 Patented July 10, 1923.

nUFUs r. BARNES, or SPRINGFIELD, MASSACHUSETTS.

p NUT-TAPPING MACHINE.

Application vfiieiiramh 1e, 192i.

i' Tocvh'om imag concern:

Be it known that I, Burris F. BAnNns, a citizen of' the United States,residing at Springfield,"l in the county of Hampden,

. State of Massachusetts, have invented 'certain new andv usefulImprovements in Nut- Ta'pping Machines; and I the following to'vbe a`full, clear, and exact description "of the invention, such as willenableothersskilled in the art towhich it y appertainsto make and usethe saine.

rlhis invention relates to new and'useful iin rovements 'in-"nut tappingmachines.'

(gne object of the invention is to provide ya. `n'iachine of this`character wherein the tap is fed down `through the bore of the nut ata` slow speed, and fed or drawn upwardly outl of the nut at a highspeed;

r`Another object is .automatically feeding t-he nutblanks intopositionbeneath the tap, said feeding means being operable by` the'means which automatically `shifts or changes' the gear from lowtohighl vA further object `resides 1n the provision of 'means for"accommodatingnut blanks of t different sizes and means' for regulatinv theview'through the nut action `of'the feeding means in accor'ance with thesizeof the nut blanks. v

Other objects Aand advantageswill be apparent from the followingdescription when taken in connection with the accompanying drawings. y

`In'the drawings: y:Figure 1 is aKV side elevation of a nut tappingmachine madepin accordance with the invention. l

Figure 2 is a front elevation of the same.

igu're 3 is a horizontal transverse `sectionalview abovev the nut blankfeeding 4mechanism, on the line 3 3 of Figure 2.

Figure 4 is a vertical longitudinal central sectional view through thenut feeding mechanism, oiithe line 4-4 of` F igure3.

Figure 54 is a vertical transverse sectional blank channel, on the line5 5 of FigureB. s i

Referring particularly tothe accompany'- ingw drawings, 10 represents a'standard having 'a horizontally` extending arin. 11 at. its 'upper endin vwhich isy formed a vertical do hereby declare to providea machine of`'this character wherein .the change of 'speedis accomplishedautomatically bythe y then the other,

' intermediate serial No. 452,861.` f

threaded and removable nut 12 for the passage of the upper threadedportion of the removable stem 13. `Carried by the standard, at asuitable distance below the arm 11, and extending in the same directionthereof, is a table 14. Extending outwardly from the standard, below thearm 11 are the vertically aligned arms or brackets 15 throu h which thestem 13 is rotatably disposed.' T e lower end of the stem isprovidedwith a chuck 16 to hold the' tap 17. The thread of the tap 17and of the nut 12 are the same pitch. Secured on the stem or spindle 13,between the brackets 15, is a belt wheel`18 driven by the belt 19, fromthe wheel 20, carried by the shaft 21, which is supported in the bracket22, on the standard 10. Also secured on the spindle 13, above the upperbracket 15, for rotation with the said spindle,

`is a horizontal disk 23.

0n the opposite ends of the shaft 21 are secured the gears`24 and 25,respectively, the inner portion of the former gear having a clutch face24 while the latter gear has the inner clutch face 25. Slidable'on theshaft 21, between the clutch faces 24 and 25', is a double-ended clutchsleeve 26 arranged to engage first one gearface and as the sleeve isslipped along the shaft.

Also mounted in the bracket 22 are the shafts 27 and 28, disposed inparallel relation to the shaft 21. On the ends of the shaft 27 are thegears 29 and 30, respectively, the former being larger than the latterand meshing with the gear 24, of the shaft 21, while 'thelatter mesheswith the small gear 31, on the shaft 28. The shaft 27 has a drive pulley32`on one end which receives power from a suitable source,

and which is provided with a clutch 33,`

whereby the power out.

Detachably mounted on the table 14 isa longitudinally channeled block34, and within the block 341s a second narrower and longitudinallychanneled block 35, through which the nut blanks 36 pass.V Set screwsare disposed through one side of the block 34 for engagement'against theadjacent side of the inner block 35, to hold' the latter in properposition. Supported over one end of the blocks`34 and 35, is a verticaltube 37 in which are disposed the nut blanks 36,' the lower end of saidtube being formed with a side opening 38 to permit one blank may bethrown" in 'and end. in a bracket 4l, is a depending lever nected 42,the ylower end of which is pivotally conwith the stem 39 of the plunger39. The lever 42, below its pivot, is formed with a longitudinal seriesof openings 43, cari-yf ing in one of them a pivot pin 44 to which isconnected al link 45. Pivotally supported on the` standard 10 is avertical lever 46, the

mentwith one face ofthe disk.

' said lever.

o which is turned in a direction toward the stem 13, andis bifurcated,as shown at 47. This bifurcation straddles the edge portion of the `disk23, and each furcation carries a vertical screw 48 for engage- The lowerend of `the lever 46 isalso bifurcated and straddles .the double clutchksleeve 26, so that whenjthe disk 23 rises and falls, with the verticalmovementof the stein 13, the one screw 48, or the otherone will beengaged by the diskand the lever rocked, with the -resultthat the'`sleeve 26 will be slipped along the shaft 2l, and one or the other ofits endsl engaged with a clutch face of a` gear, of said shaft. VMountedfor rotation on,the standard l0, adjacent the lever 46, and belowthepivotthereof, is a vertical disk 49, having formed on its periphery.the radially extending arm 50, which is pivotally connected with theother end of the `before-mentioned link 45, by means of theplink 49 andthebell crank 50', the latter `whichis supportedlon the bracket l0carried by the standard 10. Loosely mountupper end of edon the shaft ofthe disk 49 is a -dependingV arm 51, the outer end of which projectsbeyond the edge ofthe disk in the path of a laterally` extending pin 52carriedby the portion of the lever 46, below tliepivot of A spring v53,connectedv to` the arm 51, and tothe standard l0, normally andyieldablylholds said arm against a pin 54 which projects from one ofthefaces of the disk. Thus, when the lever 46 moves in one'direction itspin 52'will engage with the arm 5l, which by means of its contactl withthe, pin 54, will `swing the arm and cause the disk to rotate a`certo-ain distance. i As the diskturns the link 45 will cause the lever42to:rock on its pivot and Amovethe plunger 39 forwardly, with theresult that the lowermost nut blank `in the tube or magazine 37I will bepushed into the channel of the block 35, and thekblank whichhas beenvtappedmovedl from beneath the tapand along, the channehtowardthe chute55,

o table atthe other end of the channel, from which the` first nut willsdrop into a receptacle placed therebelow. When the lever 46 moves in theopposite direction, its pin 52 will engage withthe arm 51 and rock thesame on the disk shaft without affecting the disk.

lt will be readily seen that when the tap spindle is moving downwardly,with the tap operatively engagedinthe opening of the nut blank, to cutthreads therein,the disk 23 ismoving toward the lower screw of theforked end of the lever 46. Whenthe disk engages with the vsaid screwand rocks the lever 46 on its pivot, `thev other end of the lever willshift the sleeve26. In the down,- ward` movement of the ,tap spindle,rthel clutch sleeve 26 in engagement with the` clutch face of the, gear425 will be driven so that the speed ofthespindle will be constant and,withthe `speed ofthe threads. of the nutr 12,` and Vthe threads of thetap. When the tap has inished itsi cuttingyaction the disk 23 will haveengaged the upper` arm of they forked end of the lever 46, with the,result that the lever 46 is rocked toL shift` the sleeve 26 intoengagement with the clutclrface of the other gearj24, with the furtherresult that the spindlewill be drivenl upwardly, and the tap backed outof the nut,A at a highy speed. As the spindlerises, and at the time thatthe tap is completely outof4 the opening of the nut, the pin 521,045`the mounted on `the lever 46 will have engaged ywith theiarml has beenmoved forwardly to. advance a,A new nut blank lintoYpositionb eneaththe,tap A and the finished nut moved along toward the., chute 55. j i

It will beiunderstood that ,oncethe maga; zine tube 37 .is fil-ledigwith nutblanks, and, the power applied, ithe, oma,chinewi ll perfI formall of the functions just od eseribECLlv automaticallyv and withoutattention.

What is claimed is:-` n

l. A nut tapping, machineUincludinga, rotatable and vertically movabletapucarryf ing spindle, gearing for driving .the spindle in oppositedirections to movethe tapinto and .out @if e nut bleek, esemSbftinslverf operable by the spindle upon vertical. Inovement thereof',to changei the gearingvfrorn low to high and viceversa, a nutCblankwfe'eding. mechanism., and means Aoperable .bythe shifting leverupon ,movement kof, ,the lever f bythe spindleto actuate the feedingmechanism.

2. A nut tapping machine including aref, tatable` and` verticallyreciproeablev` tapwcarrying spindle, a. ,dnivng lgea ifor `the ,spindlef for moving the spindledownwardly `at low.; speed and, upwardly at .high-` ,speed l as shifting lever Ioperable by thespind'leon shift-,i ingthe `gear fromihigh to low; and,vice,versa, a nut blank magazine@plunger forpushingfllO the blanks successively beneath the tap, andmeans operativelyconnected with the plunger and engageable by theshifting lever for actuating the plunger.

In a nut tapping machine the combination with a tap spindle and a gearshifting lever operable thereby, of a nut .blank feeding mechanismincluding a magazine, a spring retracted plunger arranged to push theblanks from the magazine, a lever operatively connected with theplunger, a rotatable element'connected with the plunger lever, and meanson the gear shiftinglever for engagement with the rotatable element foradvancing the plunger into nut blank feeding position.

In a nut tappingmachine, the combination With a tap spindle and a gearshifting sively from the magazine into position beneath the tap, radialarm, a the plunger,

a rotatable element having a pivoted lever connected With a spring forretracting the plunger into position behind a nut blank,

anda pin on the shift-lever for moving the disk to actuate the plunger.

Inv testimony whereof, I afIiX my signature, in the presence of twoWitnesses.

, RUFUS F. BARNES.

Witnesses:l

SYDNEY B. HILnARn, MINNIE F. BARNES.

